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A train passes through a 900 meter long railway bridge. It takes 1 minute and 25 seconds from the front of the train to the rear of the train. Then the train passes through a 1800 meter long tunnel. It takes 2 minutes and 40 seconds from the front of the train into the tunnel to the rear of the train to leave the tunnel. Calculate the speed of the train and the length of the body
1 minute 25 seconds = 85 seconds, 2 minutes 40 seconds = 160 seconds,
The train speed is: (1800-900) ÷ (160-85),
=900÷75，
=12 (M / s);
Body length: 85 × 12-900，
=1020-900，
=120 (m);
A: the speed of the train is 12 m / s and the length of the body is 120 M
A 250 meter long freight train passes through the Yellow River Zhengzhou bridge at the speed of 18 kilometers per hour for 12 minutes, so how many meters is the actual length of Zhengzhou bridge
V=18km/h=300m/min
Set the bridge length as X, and the distance of train passing through the bridge s = bridge length + vehicle length = x + 250
S=Vt
x+250=300*12=3600
x=3600-250=3350m
It is known that a railway bridge is 800 meters long. There is a train passing through the bridge. It is measured that it takes 45 seconds for the train to cross the bridge completely. The time for the whole train to be completely on the bridge is 35 seconds. What is the speed and length of the train?
Set the speed of the train as x m / s and the length of the train as y M
be
45x＝800+y
35x＝800−y ，
Add the two equations to get: 80x = 1600,
∴x=20，
Substitute x = 20 into y = 100,
∴
x＝20
y＝100 ．
A: the speed of the train is 20 m / s and the length is 100 m
It takes 42 seconds for a train to pass through a 221 meter long bridge and 36 seconds to pass through a 172 meter long tunnel at the same speed______ M, what is the speed of the train______ Meters
The train speed is (221-172) ÷ (42-36),
=49÷6，
≈ 8.2 (M / s)
Conductor: 8.2 × 42-221 = 123.4 (m)
So the answer is: 123.4, 8.2
It took 25 seconds for the train to pass through a 290 meter tunnel and 23 seconds for the train to pass through a 250 meter bridge. It is also known that there is a truck in the same direction in front of the train. The truck is 270 meters long and the speed is 17 meters per second. How many seconds does it take for the train and truck to meet and leave?
Train speed: (290-250) / (25-23) = 20m / S
Train length: 20x25-290 = 210m
It takes: (210 + 270) / (20-17) = 160 seconds for the train and freight car to meet and leave
It takes 40 seconds for a train to pass through a 199 meter long bridge and 36 seconds to pass through a 172 meter long tunnel at the same speed. Find the speed and length of the train
The speed is (199-172) / (40-36) = 27 / 4 = 6.75 M / s
Vehicle length 6.75 * 40-199 ＝ 270-199 ＝ 71m
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